Laser Deposition of Tetrasulfonated Phthalocyanine Layers for Gas Sensors


Thin layers of nickel and copper tetrasulfonated phthalocyanines (NiPcTS and CuPcTS) were prepared by Matrix Assisted Pulsed Laser Evaporation method. The depositions were carried out with KrF excimer laser (energy density of laser radiation EL = 0.1 to 0.5 from dimethylsulfoxide matrix. For both materials the ablation threshold EL-th was determined. The following properties of deposited layers were characterized: a) chemical composition (FTIR spectra); b) morphology (SEM and AFM portraits); c) impedance of gas sensors based on NiPcTS and CuPcTS layers in the presence of two analytes - hydrogen and ozone. The prepared sensors exhibit response to 1000 ppm of hydrogen and 100 ppb of ozone even at laboratory temperature.

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P. Fitl, M. Vrnata, D. Kopecky, J. Vlcek, J. Skodova, J. Hofmann and V. Myslik, "Laser Deposition of Tetrasulfonated Phthalocyanine Layers for Gas Sensors," Advances in Materials Physics and Chemistry, Vol. 2 No. 4B, 2012, pp. 84-88. doi: 10.4236/ampc.2012.24B023.

Conflicts of Interest

The authors declare no conflicts of interest.


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